CVE-2015-6421 describes a denial-of-service vulnerability in the cifs-ao component of Cisco Wide Area Application Services (WAAS) and Virtual WAAS (vWAAS) devices, affecting versions 5.x before 5.3.5d and 5.4/5.5 before 5.5.3. This flaw allows unauthenticated remote attackers to trigger resource exhaustion and device reloads through specially crafted network traffic. With a CVSS score of 7.5 (High), it presents a significant availability risk due to its network-based attack vector and low attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it received limited media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.1.1CPE matchmatch criteria | cpe:2.3:a:cisco:wide_area_application_services:5.1.1:*:*:*:*:*:*:* | ||
5.1.1aCPE matchmatch criteria | cpe:2.3:a:cisco:wide_area_application_services:5.1.1a:*:*:*:*:*:*:* | ||
5.1.1bCPE matchmatch criteria | cpe:2.3:a:cisco:wide_area_application_services:5.1.1b:*:*:*:*:*:*:* | ||
5.1.1cCPE matchmatch criteria | cpe:2.3:a:cisco:wide_area_application_services:5.1.1c:*:*:*:*:*:*:* | ||
5.1.1dCPE matchmatch criteria | cpe:2.3:a:cisco:wide_area_application_services:5.1.1d:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.